CN103354935B

CN103354935B - Light-emission control device, light-emission control method, light emitting device, image display device

Info

Publication number: CN103354935B
Application number: CN201180067137.3A
Authority: CN
Inventors: 瓶子晃永; 山中聪; 吉井秀树
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2011-02-09
Filing date: 2011-12-05
Publication date: 2015-04-01
Anticipated expiration: 2031-12-05
Also published as: US8786541B2; JPWO2012108095A1; TWI450249B; US20130321491A1; WO2012108095A1; CN103354935A; TW201246166A; JP5323272B2

Abstract

A light-emission control device includes a divided-area feature amount detector (6), an extended-area feature amount detector (8), a full-screen feature amount detector (4) and a light-emission controller (30). The divided-area feature amount detector (6) detects the feature amount of an image in a divided area as a divided-area feature amount. The extended-area feature amount detector (8) detects, assuming that the extended area includes a divided area and a focused divided area around the former focused divided area, a feature amount of an image in the extended area as an extended-area feature amount of the focused divided area. The full-screen feature amount detector (4) detects the feature amount of an entire image as a full-screen feature amount. The light-emission controller (30) controls the light emission luminance of the light-emitting part corresponding to the focused divided area on the basis of the divided-area feature amount and the extended-area feature amount of the focused divided area and the full-screen feature amount.

Description

Emission control device and method, light-emitting device, image display device

Technical field

The present invention relates to emission control device and method, light-emitting device and image display device, the luminosity of the illuminating part used in the illumination of the particularly modulating sections of image display device controls.Further, the present invention relates to for making computing machine perform the program of the process of light-emitting control method and record the recording medium of embodied on computer readable of this program.

Background technology

Liquid crystal panels etc. use the display device by light type optical modulation element to have for the light source to optical modulation element irradiation illumination light.Optical modulation element adjusts the Transmission light amount from light source irradiation according to the picture signal of input, and synthetic image also shows.Optical modulation element, when showing black, becomes the state of blocking from the light of light source irradiation.But " even blocking state ", the transmitance that in fact also can not make light is zero, there is the leakage of light, therefore, the display with the phenomenon (blackspot produced due to the leakage of light) occurring a little light in black picture is become.

In order to reduce above-mentioned blackspot, considering displaying contents according to image and implementing the control of light source.In a method, in full frame, unified control light source, such as, reduce the light quantity from light source, thus can reduce blackspot in darker picture.But the high-brghtness picture images part be present in darker picture is also more secretly shown due to the reduction of light quantity of throwing light on, therefore, the problem that the dynamic range that there is display brightness is restricted.

Display device following shown in following patent documentation 1: expanding display brightness dynamic range to reduce blackspot simultaneously, the light source of backlight being divided into multiple subregion, according to each region, brightness being controlled.In display device disclosed in this patent documentation 1, be configured to use the value being weighted and obtaining the brightness settings in each several part region and the brightness settings of adjacent part areas to reset the brightness settings in each several part region, thus, the luminance difference of each subregion can be suppressed, and realize the suppression of blackspot and the expansion of display brightness dynamic range.

Prior art document

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2009-139470 publication (the 9th page, the 9th figure)

Summary of the invention

The problem that invention will solve

But in method disclosed in above-mentioned patent documentation 1, be all weighted each several part region and adjacent part areas and calculate, the brightness settings in setting each several part region, needs a large amount of calculating, and circuit scale increases.Further, decided the brightness settings in each several part region by the weighting of the brightness settings of each subregion, priority acccess control becomes imperceptible luminance difference, the problem that the expansion effect of the suppression and dynamic range that there is blackspot is suppressed.

For solving the means of problem

In emission control device of the present invention, according to view data, optical modulation is carried out to illumination light by utilizing modulating sections, formed by the image of described pictorial data representation, described illumination light is irradiated from multiple illuminating part, described multiple illuminating part is respectively to being multiple part and the region that obtains is irradiated by the segmentation of described modulating sections, if the region being split into multiple part corresponding to each illuminating part described is cut zone, described emission control device is configured to control described multiple illuminating part luminosity separately, it is characterized in that, described emission control device has: cut zone characteristic quantity test section, it is using the described cut zone of the described modulating sections in the image by described pictorial data representation as concern cut zone, detect the characteristic quantity of described concern cut zone as cut zone characteristic quantity, extended region characteristic quantity test section, its detect by the image of described pictorial data representation, the characteristic quantity of the extended region that comprises the cut zone around described concern cut zone and described concern cut zone, as the extended region characteristic quantity relevant with described concern cut zone, full frame characteristic quantity test section, it detects by the characteristic quantity of the image entirety of described pictorial data representation as full frame characteristic quantity, and light emitting control, it, according to the described cut zone characteristic quantity relevant with described concern cut zone and described extended region characteristic quantity and described full frame characteristic quantity, controls the luminosity of the described illuminating part corresponding with described concern cut zone.

Invention effect

According to the present invention, when not increasing circuit scale, the luminance difference between cut zone can be suppressed, and realizes the suppression of blackspot and the expansion of dynamic range.

Accompanying drawing explanation

Fig. 1 is the block diagram of the image display device that embodiments of the present invention 1 are shown.

Fig. 2 is the figure that cut zone and the extended region be made up of a part for modulating sections is respectively shown.

Fig. 3 is the block diagram of the structure example of the light emitting control data generating section 7 that Fig. 1 is shown.

(a) ~ (e) of Fig. 4 is when illustrating that the input image data exported from the acceptance division 2 of Fig. 1 is the 1st example, the figure of the data occurred in each portion of the image display device of Fig. 1, (a) of this figure illustrates the characteristic quantity Fa of the image of the pictorial data representation used the optical modulation of each cut zone by image exported from cut zone characteristic quantity test section 6, (b) of this figure illustrates the characteristic quantity Fb of the image of the pictorial data representation used the optical modulation by each extended region exported from extended region characteristic quantity test section 8, (c) of this figure illustrates the cut zone variation data Da exported from cut zone variation calculating part 11, (d) of this figure illustrates the extended region variation data Db exported from extended region variation calculating part 12, (e) of this figure illustrates the local variation amount data Df exported from addition portion 13.

(a) ~ (e) of Fig. 5 is when illustrating that the input image data exported from the acceptance division 2 of Fig. 1 is the 2nd example, the figure of the data occurred in each portion of the image display device of Fig. 1, (a) of this figure illustrates the characteristic quantity Fa of the image of the pictorial data representation used the optical modulation of each cut zone by image exported from cut zone characteristic quantity test section 6, (b) of this figure illustrates the characteristic quantity Fb of the image of the pictorial data representation used the optical modulation by each extended region exported from extended region characteristic quantity test section 8, (c) of this figure illustrates the cut zone variation data Da exported from cut zone variation calculating part 11, (d) of this figure illustrates the extended region variation data Db exported from extended region variation calculating part 12, (e) of this figure illustrates the local variation amount data Df exported from addition portion 13.

(a) ~ (e) of Fig. 6 is when illustrating that the input image data exported from the acceptance division 2 of Fig. 1 is the 3rd example, the figure of the data occurred in each portion of the image display device of Fig. 1, (a) of this figure illustrates the characteristic quantity Fa of the image of the pictorial data representation used the optical modulation of each cut zone by image exported from cut zone characteristic quantity test section 6, (b) of this figure illustrates the characteristic quantity Fb of the image of the pictorial data representation used the optical modulation by each extended region exported from extended region characteristic quantity test section 8, (c) of this figure illustrates the cut zone variation data Da exported from cut zone variation calculating part 11, (d) of this figure illustrates the extended region variation data Db exported from extended region variation calculating part 12, (e) of this figure illustrates the local variation amount data Df exported from addition portion 13.

Fig. 7 is the figure of the structure example that the light emitting control data generating section 7 used in embodiments of the present invention 2 is shown.

Fig. 8 is the cut zone of a part of the formation modulating sections 3 illustrated in embodiments of the present invention 2 and the figure of the example of extended region.

Fig. 9 is the figure of the structure example that the light emitting control data generating section 7 used in embodiments of the present invention 3 is shown.

Figure 10 is the figure of the structure example that the light emitting control data generating section 7 used in embodiments of the present invention 4 is shown.

Figure 11 is the figure of the structure example that the light emitting control data generating section 7 used in embodiments of the present invention 5 is shown.

Figure 12 is the figure of the structure example that the light emitting control data generating section 7 used in embodiments of the present invention 6 is shown.

Figure 13 is the figure of the example that the cut zone of carrying out OSD display is shown.

Figure 14 is the figure of the structure example illustrated along cut zone when picture short side edge configuration light-emitting component.

Figure 15 is the figure of another structure example illustrated along cut zone when edge, picture long limit configuration light-emitting component.

Embodiment

Embodiment 1

Fig. 1 is the block diagram of the image display device that embodiments of the present invention 1 are shown.Image display device shown in Fig. 1 has input terminal 1, acceptance division 2, modulating sections 3, multiple i.e. N number of (N is the integer of more than 2) illuminating part 5-1 ~ 5-N, cut zone characteristic quantity test section 6, extended region characteristic quantity test section 8, full frame characteristic quantity test section 4, light emitting control data generating section 7 and luminous drive division 9.

Cut zone characteristic quantity test section 6 wherein, extended region characteristic quantity test section 8, full frame characteristic quantity test section 4, light emitting control data generating section 7 and luminous drive division 9 form emission control device, and then this emission control device and illuminating part 5-1 ~ 5-N form light-emitting device.

Input terminal 1 is supplied to the picture signal of the prescribed form used in such as televisor or computing machine etc.

Acceptance division 2 receives the picture signal supplied input terminal 1, and the color data being converted into RGB or the view data that is made up of brightness and chromatism data also export.View data comprises the pixel value of the light transmission rate in each pixel determining aftermentioned modulating sections 3.When being transfused to the picture signal of analog form, acceptance division 2 is made up of A/D converter etc., and when the picture signal after being transfused to modulation, acceptance division 2 is made up of the detuner specified.

The view data exported from acceptance division 2 is imported into modulating sections 3, cut zone characteristic quantity test section 6, extended region characteristic quantity test section 8 and full frame characteristic quantity test section 4.

Modulating sections 3 carries out optical modulation according to view data to the illumination light carrying out self-luminescent part 5-1 ~ 5-N, is formed by the image of pictorial data representation, such as, is made up of transmissive liquid crystal panel.Transmissive liquid crystal panel has multiple pixel as optical modulation element, and the light transmission rate of each pixel is controlled by the respective pixel value of view data.

Region corresponding with illuminating part 5-1 ~ 5-N respectively in modulating sections 3 or part are called subregion or cut zone 3-1 ~ 3-N.Each cut zone includes multiple pixel.The part corresponding with each illuminating part in modulating sections 3 means that the light from this illuminating part plays the light modulating pixels of mastery effect, in other words, the set of the pixel accepting the light from this illuminating part compared with the light from other each illuminating part is more meaned.Such as, as shown in Figure 2, modulating sections 3 corresponds to display frame and is formed as rectangle, is made up of V × H=N the cut zone 3-1 ~ 3-N of longitudinal V (in illustrative example V=7), horizontal H (in illustrative example H=9).

As mentioned above, each cut zone 3-n(n of modulating sections 3 is any one party in 1 ~ N) corresponding to 1 illuminating part 5-n, the cut zone 3-n of modulating sections 3 throws light on primarily of the illuminating part 5-n of correspondence.Each illuminating part 5-n be independently control relative to other illuminating part its luminosity by control unit, each illuminating part 5-n is made up of the light-emitting component such as LED of more than 1 or 2.

Each cut zone 3-n of modulating sections 3 horizontal and vertical position in its display frame is by (h v) represents.

In fig. 2, h=1 in the row of the leftmost side, h=H in the row of the rightmost side, v=1 in the row of top side, v=V in the row of lower side.

According to the position defined as mentioned above, (h, v), each cut zone 3-n of modulating sections 3 is expressed as J(h sometimes, v).Equally, also according to the position of the cut zone of the modulating sections of correspondence, (h v) by symbol 5(h, v) represents illuminating part 5-1 ~ 5-N.

By each cut zone J(h, the extended region K(h that cut zone formation v) and is around relevant with above-mentioned each cut zone, v).Following example shown in Figure 2: the cut zone J(5 of central authorities, 4) for paying close attention to cut zone, by the cut zone J(4 around it, 3), J(5,3), J(6,3), J(4,4), J(5,4), J(6,4), J(4,5), J(5,5), J(6,5) extended region K(5 is formed, 4).

The line number or the columns that also there is cut zone are the situation of 2.

Such as, Figure 14 illustrates that line number is 8, columns is the situation of 2, and Figure 15 illustrates that columns is 8, line number is the situation of 2.

Such as, when using the arrangement shown in Figure 14 along when picture short side edge configuration light-emitting component, the arrangement shown in Figure 15 is used when configuring light-emitting component along the edge, long limit of picture.In any case, each cut zone is all the region that 1 illuminating part forming with by one or more light-emitting components is corresponding.

When the arrangement of Figure 14, the extended region for each cut zone (concern cut zone) is made up of the cut zone belonging to the row identical with this concern cut zone and be configured in the row of side relative to the row belonging to this concern cut zone.Such as, for cut zone J(1,3) extended region by the cut zone J(1 of same column, 2), J(1,3), J(1,4) the cut zone J(2 of row adjacent with right, 2), J(2,3), J(2,4) form.

When the arrangement of Figure 15, for each cut zone (concern cut zone) extended region by belong to the row identical with this concern cut zone and relative to belonging to this concern cut zone go and the cut zone being configured in the row of side is formed.Such as, for cut zone J(5,1) extended region by the cut zone J(4 of the row identical with this cut zone, 1), J(5,1), J(6,1) the cut zone J(4 of the row adjacent with below, 2), J(5,2), J(6,2) form.

Describing in detail as following, in image display device of the present invention, in order to each illuminating part 5(h, v) luminosity controls, will with this (as control object) cut zone J(h that illuminating part is corresponding, v) as paying close attention to cut zone, according to the characteristic quantity of the image of the pictorial data representation used in the optical modulation by this concern cut zone, by the extended region K(h comprising this concern cut zone, the characteristic quantity of the image of the pictorial data representation used in optical modulation v) and the characteristic quantity (characteristic quantity of full frame) of image entirety control.

Cut zone characteristic quantity test section 6 accepts the input image data Di exported from acceptance division 2, generate by each cut zone J(h of the modulating sections 3 in this input image data Di, the characteristic quantity of the image of the pictorial data representation used in optical modulation v) (in other words, in the image represented by input image data Di by cut zone J(h, the characteristic quantity of the part v) formed), as cut zone characteristic quantity Fa(h, v) export.

Below, sometimes by the characteristic quantity of the image of pictorial data representation that uses in the optical modulation by each cut zone referred to as this " characteristic quantity of the image of cut zone " or should " characteristic quantity relevant with cut zone ".

Extended region characteristic quantity test section 8 accepts the input image data Di exported from acceptance division 2, generate by this input image data Di with each cut zone J(h of modulating sections 3, v) relevant extended region K(h, the characteristic quantity of the image of the pictorial data representation used in optical modulation v) (in other words, in the image represented by input image data Di by extended region K(h, the characteristic quantity of the part v) formed), as extended region characteristic quantity Fb(h, v) export.

Below, sometimes by the characteristic quantity of the image of pictorial data representation that uses in the optical modulation by each extended region referred to as this " characteristic quantity of the image of extended region " or should " characteristic quantity relevant with extended region ".

In the example shown in Fig. 2, by each cut zone J(h, v) as paying close attention to cut zone, by 8 cut zone that are adjacent with this concern cut zone and that configure in the mode of surrounding this concern cut zone, in other words, by lateral coordinates and longitudinal coordinate relative to each concern cut zone J(h, v) 8 cut zone J(h-1 of " 1 " are differed, v-1), J(h, v-1), J(h+1, v-1), J(h-1, v), J(h+1, v), J(h-1, v+1), J(h, v+1), J(h+1, and this concern cut zone v+1), form extended region (concern extended region) K(h relevant with this concern cut zone, v), but, the defining method paying close attention to extended region is not limited thereto, such as, also can using more wide region (such as also comprising all or part of scope of 16 cut zone of lateral coordinates and longitudinal coordinate difference " 2 ") as extended region, the shape of each extended region also can be such as left and right and/or upper and lower asymmetrical shape.And, may not be and similarly whole cut zone is determined, such as, for the cut zone (J(9 of such as Fig. 2,5) being positioned at the position adjacent with the limit up and down of modulating sections 3), be positioned at the cut zone (J(1 of such as Fig. 2 in bight, 7)), owing to there is not cut zone in the outside of modulating sections 3, therefore, only the cut zone being positioned at inner side can be formed extended region (K(9 as periphery cut zone, 5), K(1,7)).

Full frame characteristic quantity test section 4, according to the input image data Di exported from acceptance division 2, detects the characteristic quantity of the image of full frame, exports as full frame characteristic quantity Fc.Full frame characteristic quantity comprises the 1st full frame characteristic quantity (the full frame characteristic quantity of the 1st kind) Fc0 and the 2nd full frame characteristic quantity (the full frame characteristic quantity of the 2nd kind) Fc1.

Characteristic quantity Fa(h, v), Fb(h, v), Fc0, Fc1 be pixel value according to composing images data and the numerical value relevant with the lightness of image obtained or index respectively, such as,

By the mean value of the brightness value of the pictorial data representation relevant with each pixel, maximal value or minimum value,

By the occurrence frequency of the regulation brightness value of the pictorial data representation relevant with each pixel,

By the occurrence frequency of the specific chroma of the pictorial data representation relevant with each pixel, or

Form the mean value of the color signal of the view data relevant with each pixel, maximal value or minimum value, or

The value obtained by combination wherein more than 2.

The cut zone characteristic quantity Fa(h relevant with each cut zone, v) obtain according to the pixel value of the view data used in the optical modulation of this cut zone, such as if mean value, then this cut zone J(h, the mean value of the pixel value of the view data used in optical modulation v), if peak value, then this cut zone J(h, v) the peak value in, if the occurrence frequency of particular value, then this cut zone J(h, the value that the occurrence number of the particular pixel values in the view data used in optical modulation v) obtains divided by the pixel count of the view data used in the optical modulation of this cut zone, or value predetermined coefficients being multiplied by it and obtaining.

The extended region characteristic quantity Fb(h relevant with each cut zone, the pixel value of the view data used in the optical modulation v) according to the extended region formed by this cut zone and cut zone around thereof obtains, such as if mean value, then this extended region K(h, the mean value of the pixel value of the view data used in optical modulation v), if peak value, then this extended region K(h, the peak value of the pixel value of the view data used in optical modulation v), if the occurrence frequency of particular value, then this extended region K(h, the value that the occurrence number of the particular pixel values in the view data used in optical modulation v) obtains divided by the pixel count of the view data used in the optical modulation of this extended region, or value predetermined coefficients being multiplied by it and obtaining.

With each concern cut zone J(h, v) relevant extended region characteristic quantity (with by each concern cut zone J(h, the extended region K(h of cut zone formation v) and around, v) relevant characteristic quantity) Fb(h, v) comprise and this concern cut zone J(h, v) relevant characteristic quantity, interior, is obtained equally.Such as, according to this concern cut zone J(h, the pixel value of the pixel v) and cut zone around thereof are (namely, be positioned at this extended region K(h, v) in and be positioned at this concern cut zone J(h, the cut zone of surrounding v)) in the pixel value of pixel, need not be weighted these pixel values and obtain and each concern cut zone J(h, v) relevant extended region characteristic quantity Fb(h, v).Such as, when using mean value as characteristic quantity, with each concern cut zone J(h, v) relevant extended region characteristic quantity Fb(h, v) be need not according to this concern cut zone J(h, the mean value (simple mean value) that the pixel value of the pixel in the pixel value of the pixel v) and cut zone around thereof is weighted and obtains.

1st full frame characteristic quantity Fc0 and the 2nd full frame characteristic quantity Fc1 obtains according to the pixel value of the whole pixels in picture respectively, such as if mean value, then the mean value of picture entirety, if peak value, it is then the peak value in picture entirety, if the occurrence frequency of particular value, be then the value that the occurrence number in picture entirety obtains divided by the pixel count of picture entirety or value predetermined coefficients being multiplied by it and obtaining.

Consider that the width of cut zone determines that for each cut zone be the occurrence frequency using mean value or use peak value, minimum value, regulation brightness value.Such as, when each cut zone is narrower, according to the occurrence frequency of peak value, minimum value, regulation brightness value, the lightness of this cut zone can be inferred with fully high precision.When each cut zone is wider, in order to improve the supposition precision of lightness, preferably use mean value.

Characteristic quantity Fa(h, v), Fb(h, v), Fc1 is the value (value of the identical type in above illustrative characteristic quantity) of identical type.Characteristic quantity Fc0 can be the value with described 3 kinds of characteristic quantity identical type, can be also different types of value.In different types of situation, such as, characteristic quantity Fa(h, v), Fb(h, v), Fc1 can be the peak value of brightness, and characteristic quantity Fc0 can be the mean value of brightness.

Cut zone characteristic quantity Fa(h, v), extended region characteristic quantity Fb(h, v) and full frame characteristic quantity Fc0, Fc1 be fed into light emitting control data generating section 7.

Light emitting control data generating section 7 according to each cut zone J(h, v) relevant cut zone characteristic quantity Fa (h, v) with extended region characteristic quantity Fb(h, v) and full frame characteristic quantity Fc0, Fc1, generate the light emitting control data Y(h relevant with this cut zone, v).

This light emitting control data Y(h, is v) fed into luminous drive division 9, for determining corresponding illuminating part 5(h, lighting level (brightness degree) v).

Luminous drive division 9, according to the light emitting control data Y(h of each cut zone inputted from light emitting control data generating section 7, v), generates for driving the illuminating part 5(h corresponding with this cut zone, v) drive singal Q(h, v), this illuminating part 5(h is outputted to, v).

Light emitting control data generating section 7 and luminous drive division 9 form light emitting control 30, this light emitting control 30 is according to each the cut zone J(h with modulating sections 3, v) relevant cut zone characteristic quantity Fa(h, v) with extended region characteristic quantity Fb(h, v) and full frame characteristic quantity Fc0, Fc1, the luminosity of the illuminating part corresponding with this cut zone is controlled.

Fig. 3 illustrates the structure example of the light emitting control data generating section 7 of Fig. 1.

Illustrated light emitting control data generating section 7 has full frame light emitting control data conversion unit 10, cut zone variation calculating part 11, extended region variation calculating part 12, addition portion 13, amount of change data generating section 14 and addition portion 15.

The 1st full frame characteristic quantity Fc0 detected by the full frame characteristic quantity test section 4 of Fig. 1 is imported into full frame light emitting control data conversion unit 10, is converted to full frame light emitting control data D0 and exports.

The value of full frame light emitting control data D0 is by the monotonically increasing function f(Fc0 about the 1st full frame characteristic quantity Fc0) represent, if the 1st full frame characteristic quantity Fc0 increases on the whole, then the value D0 of full frame light emitting control data also increases, but, additional restriction, becomes negative value to avoid cut zone light emitting control data Y and makes it can not exceed regulation maximal value as described later.The value of full frame light emitting control data D0 is imported into addition portion 15.

The cut zone characteristic quantity Fa detected by the cut zone characteristic quantity test section 6 of Fig. 1 and the 2nd full frame characteristic quantity Fc1 detected by the full frame characteristic quantity test section 4 of Fig. 1 is imported into cut zone variation calculating part 11.

Cut zone variation calculating part 11 from each cut zone J(h, v) relevant cut zone characteristic quantity Fa(h, deduct the 2nd full frame characteristic quantity Fc1 v), export the cut zone variation data Da(h of difference both representing, v).Cut zone variation data Da(h, v) represents the variation of each cut zone.The cut zone variation data Da exported from cut zone variation calculating part 11 is imported into addition portion 13.

The extended region characteristic quantity Fb detected by the extended region characteristic quantity test section 8 of Fig. 1 and the 2nd full frame characteristic quantity Fc1 detected by the full frame characteristic quantity test section 4 of Fig. 1 is imported into extended region variation calculating part 12.

Extended region variation calculating part 12 from each cut zone J(h, v) relevant extended region characteristic quantity (namely, with correspond to cut zone J(h, v) extended region K(h, v) relevant extended region characteristic quantity) Fb(h, v) deduct the 2nd full frame characteristic quantity Fc1 in, export the extended region variation data Db(h of the difference both representing, v).Extended region variation data Db(h, v) represents the variation of each extended region.The extended region variation data Db exported from extended region variation calculating part 12 is imported into addition portion 13.

Addition portion 13 for each cut zone add with cut zone variation data Da(h, v) the extended region variation data Db(h that identical cut zone is relevant, v), export addition result and measure data Df(h as the local variation relevant with this cut zone, v).

The local variation amount data Df exported from addition portion 13 is imported into amount of change data generating section 14, is converted to the brightness amount of change data De of each cut zone and exports.

The value of brightness amount of change data De is by the monotonically increasing function g(Df measuring data Df about local variation) represent, if Df increases on the whole, the value of then brightness amount of change data De also increases, but, additional restriction, becomes negative value to avoid cut zone light emitting control data Y and makes it can not exceed regulation maximal value as described later.Brightness amount of change data De is imported into addition portion 15.

Addition portion 15, to the full frame light emitting control data D0 of input and the brightness amount of change data De(h relevant with each cut zone, is v) added, exports the light emitting control data Y(h relevant with this cut zone, and v) (=D0+De(h, v)).

Picture entirety is obtained as object by full frame light emitting control data D0, the data suitable with the mean value of the value of certain characteristic quantity or picture entirety, also referred to as " flip-flop ".On the other hand, brightness amount of change data De(h is v) with the value of each cut zone relative to the difference of the mean value of the picture entirety of this characteristic quantity or the suitable data of variation, also referred to as " alternating component ".

The data suitable with the variation (alternating component) of each cut zone should contribute to the improvement of the dynamic range shown and these both sides of suppression of blackspot, and then, the above-mentioned data suitable with the mean value (flip-flop) of entirety bear the effect of the brightness reducing picture entirety as much as possible, have the effect suppressing blackspot.

Below, cut zone characteristic quantity Fa, extended region Fb and the 1st full frame characteristic quantity Fc0 and the 2nd full frame characteristic quantity Fc1 is all the mean flow rate of image, therefore, for the situation of Fc0=Fc1, about several examples of image, to the mean flow rate Fa(h of each cut zone detected by cut zone characteristic quantity test section 6, v), the mean flow rate Fb(h of each extended region detected by extended region characteristic quantity test section 8, v), the cut zone variation data Da(h calculated by cut zone variation calculating part 11, v), the extended region variation data Db(h calculated by extended region variation calculating part 12, v) the local variation amount data Df(h and by addition portion 13 obtained, v) be described.In the following examples, the modulating sections 3 corresponding with the entirety of display frame is made up of 25 cut zone of 5 × 5, and (h is v) represented by (1,1) ~ (5,5) coordinate of each cut zone.

In the example shown in Fig. 4 (a), only there is hi-lite at the center of image, the average brightness value Fa(3 of the image of the pictorial data representation used in the optical modulation by the cut zone at center, 3) be " 40 ", by the average brightness value Fa(h of the image of the pictorial data representation used in the optical modulation of other cut zone, v) (h=1 ~ 5, v=1 ~ 5, wherein, h=3 and the situation of v=3 is removed) be " 0 ".Further, by (h, the average brightness value Fb(h of the image of the pictorial data representation used in the optical modulation of v) relevant extended region, v) as shown in (b) of Fig. 4 with each cut zone.

When calculating with integer (when rounding up to result of calculation), the value as the mean flow rate (Fc0=Fc1) of the full frame of the 1st full frame characteristic quantity and the 2nd full frame characteristic quantity is " 2 ".

From the cut zone mean flow rate Fa(h shown in (a) of Fig. 4, v), deduct full frame mean flow rate Fc1(=Fc0) and the cut zone variation data Da(h obtained, v) as shown in (c) of Fig. 4.The cut zone variation data Da(h obtained like this, v), the luminance difference between the cut zone at center and the cut zone be adjacent is not inhibited.

From the extended region average brightness value Fb(h shown in (b) of Fig. 4, v), deduct full frame average brightness value Fc1(=Fc0) and the extended region variation data Db(h obtained, v) as shown in (d) of Fig. 4.Extended region variation data Db(h shown in (d) of Fig. 4, v), although the luminance difference between adjacent segmentation region is inhibited, the hi-lite at center is emphasized.

To the cut zone variation data Da(h of (c) of Fig. 4, v) with the extended region variation data Db(h of (d) of Fig. 4, v) carry out being added and obtain local variation amount data Df(h, v) as shown in (e) of Fig. 4, the hi-lite of central authorities is emphasized, and and brightness difference between adjacent cut zone be also inhibited.

In the example shown in (a) of Fig. 5, hi-lite is there is at the center of image and corner, the average brightness value Fa(3 of the image of the pictorial data representation used in the optical modulation by the cut zone at center, 3) be " 40 ", the average brightness value Fa(1 of the image of the pictorial data representation used in the optical modulation by the cut zone in the upper left corner, 1) be " 25 ", the average brightness value Fa(5 of the image of the pictorial data representation used in the optical modulation by the cut zone in the upper right corner, 1) be " 30 ", the average brightness value Fa(1 of the image of the pictorial data representation used in the optical modulation by the cut zone in the lower left corner, 5) be " 35 ", the average brightness value Fa(5 of the image of the pictorial data representation used in the optical modulation by the cut zone in the lower right corner, 5) be " 40 ", by the average brightness value Fa(h of the image of the pictorial data representation used in the optical modulation of other cut zone, v) be " 0 ".Further, by (h, the average brightness value Fb(h of the image of the pictorial data representation used in the optical modulation of v) relevant extended region, v) as shown in (b) of Fig. 5 with each cut zone.

When calculating with integer (when rounding up to result of calculation), the value as the mean flow rate (Fc0=Fc1) of the full frame of the 1st full frame characteristic quantity and the 2nd full frame characteristic quantity is " 7 ".

From the cut zone mean flow rate Fa(h shown in (a) of Fig. 5, v), deduct full frame mean flow rate Fc1(=Fc0) and the cut zone variation data Da(h obtained, v) as shown in (c) of Fig. 5.The cut zone variation data Da(h obtained like this, v), the luminance difference between the cut zone of center and corner and the cut zone be adjacent is not inhibited.

From the extended region average brightness value Fb(h shown in (b) of Fig. 5, v), deduct full frame average brightness value Fc1(=Fc0) and the extended region variation data Db(h obtained, v) as shown in (d) of Fig. 5.Extended region variation data Db(h shown in (d) of Fig. 5, v), although the luminance difference between adjacent segmentation region is inhibited, the hi-lite of center and corner is emphasized.

To the cut zone variation data Da(h of (c) of Fig. 5, v) with the extended region variation data Db(h of (d) of Fig. 5, v) carry out being added and obtain local variation amount data Df(h, v) as shown in (e) of Fig. 5, central authorities and the hi-lite of corner are emphasized, and and luminance difference between adjacent cut zone be also inhibited.

In the example shown in (a) of Fig. 6, hi-lite is there is with oblique below at the center of image and oblique upper thereof, the average brightness value Fa(3 of the image of the pictorial data representation used in the optical modulation by the cut zone at center, 3) be " 40 ", the average brightness value Fa(2 of the image of the pictorial data representation used in the optical modulation by the upper left cut zone at center, 2) be " 25 ", the average brightness value Fa(4 of the image of the pictorial data representation used in the optical modulation by the top-right cut zone at center, 2) be " 30 ", the average brightness value Fa(2 of the image of the pictorial data representation used in the optical modulation by the cut zone of the lower left at center, 4) be " 35 ", the average brightness value Fa(4 of the image of the pictorial data representation used in the optical modulation by the bottom-right cut zone at center, 4) be " 40 ", by the average brightness value Fa(h of the image of the pictorial data representation used in the optical modulation of other cut zone, v) be " 0 ".Further, by (h, the average brightness value Fb(h of the image of the pictorial data representation used in the optical modulation of v) relevant extended region, v) as shown in (b) of Fig. 6 with each cut zone.

From the cut zone mean flow rate Fa(h shown in (a) of Fig. 6, v), deduct full frame mean flow rate Fc1(=Fc0) and the cut zone variation data Da(h obtained, v) as shown in (c) of Fig. 6.The cut zone variation data Da(h obtained like this, v), the luminance difference between the cut zone of center and oblique upper, tiltedly below and the cut zone be adjacent is not inhibited.

From the extended region average brightness value Fb(h shown in (b) of Fig. 6, v), deduct full frame average brightness value Fc1(=Fc0) and the extended region variation data Db(h obtained, v) as shown in (d) of Fig. 6.Extended region variation data Db(h shown in (d) of Fig. 6, v), although the luminance difference between adjacent segmentation region is inhibited, the oblique upper at center and center, the tiltedly hi-lite of below are emphasized.

To the cut zone variation data Da(h of (c) of Fig. 6, v) with the extended region variation data Db(h of (d) of Fig. 6, v) carry out being added and obtain local variation amount data Df(h, v) as shown in (e) of Fig. 6, the oblique upper at central authorities and center, tiltedly below hi-lite emphasized, and and luminance difference between adjacent cut zone be also inhibited.

According to the local variation amount data Df(h of each cut zone obtained like this, v) the brightness amount of change data De(h of each cut zone is obtained, v), it being added with the full frame light emitting control data D0 obtained by carrying out changing from full frame characteristic quantity Fc0, generating the light emitting control data Y(h of each cut zone, v), according to this light emitting control data Y(h, v), the illuminating part 5(h corresponding with each cut zone is controlled, luminosity v).As a result, can hi-lite be coordinated, and suppress the luminance difference between adjacent cut zone.Therefore, it is possible to expand dynamic range and suppress blackspot.

When carrying out supplementary, the darker picture of full frame characteristic quantity generation is utilized to suppress the data of comprehensive illuminating of blackspot, brighter Picture Showing bright white.Here, utilize the difference between the cut zone characteristic quantity owing to paying close attention to cut zone and the difference between the extended region characteristic quantity paying close attention to cut zone and data measures by the local variation that causes, the luminosity of the illuminating part corresponding with concern cut zone is changed.The full frame characteristic quantity that the data of full frame illuminating do not exist deviation according to (between the illuminating part corresponding with cut zone) luminosity between cut zone originally generates.Based on the data of this full frame illuminating, additional non-visuognosis is to local variation's amount data of the deviation levels of interregional luminosity.This process makes to be suppressed to non-visuognosis and becomes easy to the deviation levels of interregional luminosity.

And then, when the data of additional comprehensive illuminating and non-visuognosis are to local variation's amount data of the deviation levels of interregional luminosity, carry out face luminescence in the mode showing bright white compared with dark areas suppression blackspot, brighter areas.Thereby, it is possible to expand the dynamic range of luminosity.

And then, use the characteristic quantity and the characteristic quantity comprising the extended region paying close attention to cut zone paid close attention to based on the cut zone of the light-emitting data of full frame characteristic quantity, luminosity is changed.That is, owing to also comprising the surrounding features paying close attention to cut zone, therefore, can not be weighted and also can pay attention to paying close attention to cut zone, and be considered the effect that the correlationship between peripheral region is weighted.

The process be weighted the information from cut zone needs to learn pays close attention to the such complex process of position relationship between cut zone and other cut zone, distance relation.And then, because the information from regional does not exist correlationship, therefore, need more complicated process to be weighted.Do not need the process of this complexity, can by realizing based on simply dealt hardware simplicity structure.

Embodiment 2

Fig. 7 illustrates the light emitting control data generating section 7, cut zone characteristic quantity test section 6, extended region characteristic quantity test section 8b and the full frame characteristic quantity test section 4b that use in the image display device of embodiments of the present invention 2.

Light emitting control data generating section 7 shown in Fig. 7 is for the extended region of the multiple mutual different in width of each cut zone setting, for reducing the brightness difference between adjacent segmentation region further, there is full frame light emitting control data conversion unit 10, cut zone variation calculating part the 11, the 1st extended region variation calculating part 12-1 ~ the M extended region variation calculating part 12-M, addition portion 13b, amount of change data generating section 14 and addition portion 15.In the figure 7, identical action is carried out with the parts of Fig. 3 same-sign.

Extended region characteristic quantity test section 8b accepts the input image data Di exported from acceptance division 2, and for each cut zone J(h of modulating sections 3, v), setting comprises this cut zone J(h, the 1st extended region K v) ₁(h, v) ~ M(M is the integer of more than 2) extended region K _m(h v), exports the characteristic quantity Fb of the image of each extended region ₁(h, v) ~ Fb _m(h, v).

1st extended region K ₁(h, v) such as with the extended region K(h in embodiment 1, v) identical.2nd extended region K ₂(h, v) than the 1st extended region K ₁(h v) greatly, comprises the 1st extended region K ₁(h, the cut zone of more than 1 v) and around.Usually, m(m is any one party in 2 ~ M) extended region K _m(h, v) than (m-1) extended region K _(m-1)(h v) greatly, comprises (m-1) extended region K _(m-1)(h, the cut zone of more than 1 v) and around.

Fig. 8 illustrates the 1st extended region K when M=2 ₁(h, the v) with 2nd extended region K ₂(h, v).In the example shown in Fig. 8, the 1st extended region K ₁(h, v) with the extended region K(5 shown in Fig. 2,4) similarly formed, the 2nd extended region K ₂(h v) comprises the 1st extended region K ₁(h v), and then comprises and is positioned at around it, to surround the 1st extended region K ₁(h, 16 cut zone that mode v) exists.

In the arrangement of Figure 14 when M=2, the 1st extended region and the 2nd extended region for each cut zone (concern cut zone) are made up of the cut zone belonging to the row identical with this concern cut zone and be configured in the row of side relative to the row belonging to this concern cut zone.Such as, for cut zone J(1,3) the 1st extended region by the cut zone J(1 of same column, 2), J(1,3), J(1,4) the cut zone J(2 of row adjacent with right, 2), J(2,3), J(2,4) form, the 2nd extended region by the cut zone J(1 of same column, 1), J(1,2), J(1,3), J(1,4), J(1,5) the cut zone J(2 of adjacent with right row, 1), J(2,2), J(2,3), J(2,4), J(2,5) form.Like this, 2nd extended region relevant with each concern cut zone, relative to 1st extended region relevant with identical concern cut zone, is only expanded in same column.

In the arrangement of Figure 15 when M=2, for each cut zone (concern cut zone) the 1st extended region and the 2nd extended region by belong to the row identical with this concern cut zone and relative to belonging to this concern cut zone go and the cut zone being configured in the row of side is formed.Such as, for cut zone J(5,1) the 1st extended region by the cut zone J(4 gone together mutually, 1), J(5,1), J(6,1) the cut zone J(4 of the row adjacent with below, 2), J(5,2), J(6,2) form, the 2nd extended region by the cut zone J(3 gone together mutually, 1), J(4,1), J(5,1), J(6,1), J(7,1) the cut zone J(3 of adjacent with below row, 2), J(4,2), J(5,2), J(6,2), J(7,2) form.Like this, 2nd extended region relevant with each concern cut zone, relative to 1st extended region relevant with identical concern cut zone, is only expanded in going together mutually.

Can say, the extended region characteristic quantity test section 8b of present embodiment, for each cut zone, exports the multiple extended region K with stages propagate ₁(h, v) ~ K _m(h, v) relevant characteristic quantity.

With each concern cut zone J(h, and v) relevant m extended region characteristic quantity (with each concern cut zone J(h, v) relevant m extended region K _m(h, the characteristic quantity of image v)) Fb _m(h v) comprises and this concern cut zone J(h, v) relevant (m-1) extended region K _(m-1)(h, characteristic quantity v), interior, is obtained equally.Such as, according to this concern cut zone J(h, v) relevant (m-1) extended region K _(m-1)(h, pixel value and the cut zone around thereof of the pixel v) (that is, are positioned at this m extended region K _m(h, v) in and be positioned at this (m-1) extended region K _(m-1)the pixel value of the pixel in (h, the cut zone v)), when not being weighted these pixel values, obtains and each concern cut zone J(h, v) relevant m extended region characteristic quantity Fb _m(h, v).Such as, when using mean value as characteristic quantity, with each concern cut zone J(h, v) relevant m extended region characteristic quantity Fb _m(h is v) need not to be weighted and according to this (m-1) extended region K _(m-1)(h, the mean value (simple mean value) that the pixel value of the pixel in the pixel value of the pixel v) and cut zone around thereof is obtained.

Full frame characteristic quantity test section 4b is according to the input image data Di exported from acceptance division 2, and the 1st full frame characteristic quantity Fc0 of detection full frame and the 2nd full frame characteristic quantity Fc1 also exports.

1st extended region variation calculating part 12-1 ~ the M extended region variation calculating part 12-M obtains and the 1st extended region K respectively ₁(h, v) ~ M extended region K _m(h, the 1st v) relevant extended region characteristic quantity Fb ₁(h, v) ~ M extended region characteristic quantity Fb _m(h, the difference of the v) with 2nd full frame characteristic quantity Fc1 export the 1st extended region variation data Db ₁(h, v) ~ M extended region variation data Db _m(h, v).

From the 1st extended region variation data Db that the 1st extended region variation calculating part 12-1 ~ the M extended region variation calculating part 12-M exports ₁(h, v) ~ M extended region variation data Db _m(h, is v) all imported into addition portion 13b, in addition portion 13b, with cut zone variation data Da(h, is v) added, and is obtained local variation amount data Df(h, v) by this addition.

Amount of change data generating section 14, according to the local variation amount data Df(h from addition portion 13b, v) generates brightness amount of change data De(h, v).

Like this, from the variation data Db that the 1st extended region variation calculating part 12-1 ~ the M extended region variation calculating part 12-M exports ₁(h, v) ~ Db _m(h, is v) all imported into addition portion 13b, contributes to amount of change data generating section 14 and generates brightness amount of change data De(h, v).

By at brightness amount of change data De(h, the extended region K of operational phase expansion in generation v) ₁(h, v) ~ K _m(h, variation data Db v) ₁(h, v) ~ Db _m(h, v), can in wider scope the stage (bit by bit) change the luminosity of illuminating part, the luminosity that can reduce further between adjacent segmentation region is poor, the luminance difference not easily between visuognosis adjacent segmentation region.

In addition, describe the value of full frame light emitting control data D0 by the monotonically increasing function f(Fc0 about the 1st full frame characteristic quantity Fc0) represent, the value of brightness amount of change data De is by the monotonically increasing function g(Df measuring data Df about local variation) situation about representing, but, this needs hypothesis due to light emitting control data Y(h, the increase of value v) and the situation that the brightness of illuminating part is increased are (such as, when carrying out pulse width control to illuminating part, light emitting control data Y(h, v) the situation that value is corresponding with the ON time), such as at light emitting control data Y(h, v) when value is corresponding with the OFF time, light emitting control data Y(h is made in order to increase brightness, v) value reduces, in this situation, the value of full frame light emitting control data D0 and the value of brightness amount of change data De all reduce with the increase of the value of expectation brightness.In this situation, as full frame light emitting control data D0, use and have by the monotonic decreasing function f(Fc0 about the 1st full frame characteristic quantity Fc0) data of value that represent, as brightness amount of change data De, use to have and measure the monotonic decreasing function g(Df of data Df by about local variation) data of value that represent.And then same with using the situation of the data represented by monotonically increasing function, additional restriction, becomes negative value to avoid cut zone light emitting control data Y and makes it can not exceed regulation maximal value.

Embodiment 3

Fig. 9 illustrates the light emitting control data generating section 7, cut zone characteristic quantity test section 6, extended region characteristic quantity test section 8b and the full frame characteristic quantity test section 4b that use in the image display device of embodiments of the present invention 3.

Light emitting control data generating section 7 shown in Fig. 9 is same with embodiment 2, for the extended region of the multiple mutual different in width of each cut zone setting, but, be with the difference of embodiment 2, select set extended region according to the feature of image and be used, this light emitting control data generating section 7 has full frame light emitting control data conversion unit 10, cut zone variation calculating part 11, 1st extended region variation calculating part 12-1 ~ the M extended region variation calculating part 12-M, characteristics of image detection unit 18, select addition portion 17, amount of change data generating section 14 and addition portion 15.In fig .9, identical action is carried out with the parts of Fig. 3 and Fig. 7 same-sign.

Characteristics of image detection unit 18 accepts cut zone characteristic quantity Fa, the 1st extended region characteristic quantity Fb ₁~ the M extended region characteristic quantity Fb _m, the 1st full frame characteristic quantity Fc0 and the 2nd full frame characteristic quantity Fc1, according to the feature of these characteristic quantity process decision chart pictures.

Select addition portion 17 according to the result of determination of characteristics of image detection unit 18, select extended region variation data Db ₁(h, v) ~ Db _m(h, part or all v) also exports.Select addition portion 17 by this process, determine at brightness amount of change data De(h, stratum's number of the extended region used in generation v).

Such as, at image only at 1 position of its entirety, namely by multiple cut zone J(1,1) ~ J(H, when in the part of the pictorial data representation used in the optical modulation of 1 cut zone V) for high brightness, characteristics of image detection unit 18 is according to characteristic quantity Fa, Fb, Fc0, Fc1, and particularly characteristic quantity Fa detects this situation.

The result of determination of characteristics of image detection unit 18 is imported into selects addition portion 17, and the quantity selecting addition portion 17 to be controlled so as to the extended region variation data that will be added becomes many.Such as, in these cases, to whole extended region variation data Db ₁(h, v) ~ Db _m(h is v) added.

Thus, can between the cut zone corresponding with the hi-lite of image with the cut zone away from this cut zone the stage (bit by bit) change the luminosity of corresponding illuminating part, the difference of the luminosity of corresponding illuminating part is reduced, not easily in the luminance difference of adjacent segmentation region mesopic vision recognition graph picture between adjacent segmentation region.

On the other hand, when image entirety is roughly the same brightness, characteristics of image detection unit 18 according to characteristic quantity Fa, Fb, Fc0, Fc1 particularly characteristic quantity Fa detect this situation.The result of determination of characteristics of image detection unit 18 is imported into selects addition portion 17, selects addition portion 17 only to select the variation data Db inputted ₁(h, v) ~ Db _m(h, the part is v) added.

Such as, only the 1st extended region variation data Db is selected ₁(h is v) added.Replace, also only can select the 1st extended region variation data Db ₁(h, v) ~ M extended region variation data Db _m(h, the 1st extended region variation data Db v) ₁(h, v) ~ L(L<M) extended region variation data Db _l(h, is v) added, and such as, only can select (s+1 × t), (s+2 × t), (s+3 × t) ... extended region variation data (s is the regulation integer of more than 0, and t is the regulation integer of more than 2).Like this, by selecting extended region variation data to be added, the process that inhibit processing time and power consumption can be implemented.

In addition, also along with selecting the process selecting the extended region that will be added in addition portion 17, can stop exporting in being added the Difference Calculation process in the variation calculating part (part in 12-1 ~ 12-M) of the variation data do not used.In this situation, the output of characteristics of image detection unit 18 is supplied to variation calculating part 12-1 ~ 12-M and controls.

Embodiment 4

Figure 10 illustrates the light emitting control data generating section 7 used in the image display device of embodiments of the present invention 4.Light emitting control data generating section 7 shown in Figure 10 is when the difference of the mutual brightness amount of change in adjacent segmentation region exceedes regulation tolerable limit value, carry out the adjustment of brightness amount of change data, there is Difference Calculation portion 16, ultimate value maintaining part 21 between full frame light emitting control data conversion unit 10, cut zone variation calculating part 11, extended region variation calculating part 12, addition portion 13, amount of change data generating section 14, cut zone, compare handling part 20, amount of change adjustment part 19 and addition portion 15.In Fig. 10, identical action is carried out with the parts of Fig. 3, Fig. 7 and Fig. 9 same-sign.

Between cut zone, Difference Calculation portion 16 accepts the brightness amount of change data of each cut zone (each illuminating part) generated by amount of change data generating section 14, between mutually adjacent cut zone, (between illuminating part) calculates the difference of brightness amount of change, outputs to and compares handling part 20.

On the other hand, ultimate value maintaining part 21 keeps tolerable limit value.This tolerable limit value is used for (between illuminating part) restriction luminance difference between adjacent cut zone.

Between by cut zone the brightness amount of change that Difference Calculation portion 16 calculates adjacent segmentation region between (between illuminating part) difference over-limit condition maintaining part 21 in keep tolerable limit value, compare handling part 20 by this situation with represent that the information exceeding degree is supplied to amount of change adjustment part 19.

Amount of change adjustment part 19 adjusts the brightness amount of change data from amount of change data generating section 14 according to from the information comparing handling part 20.Specifically, change, to make the difference of (between illuminating part) between cut zone exceed the respective brightness amount of change of the mutually adjacent cut zone (cut zone to) of tolerable limit value close to the brightness amount of change of another cut zone, the difference of the brightness amount of change of these 2 cut zone is made to be below tolerable limit value.

In this situation, for adjacent cut zone both sides, the brightness amount of change relevant with each cut zone can be changed, also can only change a side.When only changing a side, obtain the mean value of the brightness amount of change relevant with the whole cut zone in picture, the side larger relative to the difference of above-mentioned mean value in the brightness amount of change of 2 cut zone is changed.When changing both sides, can change both sides with same degree, also can carry out change by a larger margin to the side larger relative to the difference of above-mentioned mean value (mean value of the brightness amount of change relevant with the whole cut zone in display frame) in the brightness amount of change of 2 cut zone.

In addition, because tolerable limit value is different according to the characteristic of modulating sections 3, therefore, determines tolerable limit value by carrying out mensuration under the state of illuminated in combination portion 5-1 ~ 5-N and modulating sections 3, remaining in ultimate value maintaining part 21.

Suppressing in the structure of the luminance difference between adjacent segmentation region by cut zone variation data Da and extended region variation data Db, by increasing amount of change adjustment part 19, more reliably can suppress the luminance difference between adjacent segmentation region (converging in tolerable limit), and the improvement of dynamic range can be realized.

Embodiment 5

Figure 11 illustrates the light emitting control data generating section 7 used in the image display device of embodiments of the present invention 5.Light emitting control data generating section 7 shown in Figure 11 is same with embodiment 4, the adjustment of brightness amount of change data is carried out when the difference of adjacent segmentation region (adjacent illuminating part) mutual brightness amount of change exceedes regulation tolerable limit value, but, be with the difference of embodiment 4, set multiple tolerable limit value, the tolerable limit value that will use is selected according to the feature of image, this light emitting control data generating section 7 has full frame light emitting control data conversion unit 10, cut zone variation calculating part 11, extended region variation calculating part 12, addition portion 13, amount of change data generating section 14, Difference Calculation portion 16 between cut zone, characteristics of image detection unit 18b, ultimate value maintaining part 21b, ultimate value selection portion 22, relatively handling part 20, amount of change adjustment part 19 and addition portion 15.

In fig. 11, identical action is carried out with the parts of Fig. 3, Fig. 7, Fig. 9 and Figure 10 same-sign.

The ultimate value maintaining part 21 of ultimate value maintaining part 21b and Figure 10 is identical, but, keep multiple tolerable limit value.

Characteristics of image detection unit 18b is identical with the characteristics of image detection unit 18 of embodiment 3, and the feature of process decision chart picture also exports result of determination.

Ultimate value selection portion 22 is according to the result of determination of characteristics of image detection unit 18b, and a tolerable limit value in the tolerable limit value kept in selection limit value maintaining part 21b also exports.

The easy degree of visuognosis of the luminance difference between adjacent segmentation region is different according to the feature of image.Such as, the characteristic of vision easily identifies the adjacent brightness of darker picture is poor, on the other hand, the adjacent brightness in brighter picture not easy to identify is poor.Therefore, measure for these each situations, set multiple tolerable limit value and remain in ultimate value maintaining part 21b.

Characteristics of image detection unit 18b accepts cut zone characteristic quantity Fa, extended region characteristic quantity Fb and the 1st full frame characteristic quantity Fc0 and the 2nd full frame characteristic quantity Fc1, carrys out the feature of process decision chart picture according to these characteristic quantities.

Ultimate value selection portion 22 is according to the result of determination of characteristics of image detection unit 18b, and 1 tolerable limit value in the multiple tolerable limit values kept in selection limit value maintaining part 21b also reads, and is supplied to and compares handling part 20.

Such as, when characteristics of image detection unit 18b is judged to be the dark images paying close attention to cut zone, the tolerable limit value that the value in the multiple tolerable limit values kept in selection limit value maintaining part 21b is less also exports.

On the contrary, when the image that characteristics of image detection unit 18b is judged to pay close attention to cut zone is brighter, the tolerable limit value that the value in the multiple tolerable limit values kept in selection limit value maintaining part 21b is larger also exports.

The mutual difference of the brightness amount of change that Difference Calculation portion 16 calculates between by cut zone exceedes the tolerable limit value selected by ultimate value selection portion 22, compare handling part 20 by this situation with represent that the information exceeding degree is supplied to amount of change adjustment part 19.

Same with the situation of embodiment 4, amount of change adjustment part 19 adjusts the brightness amount of change data from amount of change data generating section 14 according to from the information comparing handling part 20.Specifically, change, to make the difference between cut zone exceed the respective brightness amount of change of the mutually adjacent cut zone (cut zone to) of tolerable limit value close to the brightness amount of change of another cut zone, the difference of the brightness amount of change of these 2 cut zone is made to be below tolerable limit value.

Suppressing in the structure of the luminance difference between adjacent segmentation region by cut zone variation data Da and extended region variation data Db, by increasing amount of change adjustment part 19, more reliably can suppress the luminance difference between adjacent segmentation region (converging in the tolerable limit corresponding with the feature of image), and the improvement of dynamic range can be realized.

Embodiment 6

Figure 12 illustrates the light emitting control data generating section 7 used in the image display device of embodiments of the present invention 6.Image display device display on-chip study (OSD) information of embodiment 6.Light emitting control data generating section 7 shown in Figure 12, for this image display device, has full frame light emitting control data conversion unit 10, cut zone variation calculating part 11, extended region variation calculating part 12, addition portion 13, amount of change data generating section 14, OSD handling part 23, amount of change adjustment part 19 and addition portion 15.

Information Dosd is shown to the OSD of information and display position information that OSD handling part 23 input comprises the displaying contents representing on-chip study (OSD).This OSD shows the character of information Dosd and the different in kind of the input image data exported from the acceptance division 2 of Fig. 1, and preferred OSD display section is configured to, and can not produce luminance difference due to input image data according to each cut zone.

OSD handling part 23 shows information Dosd according to OSD and detects the cut zone will carrying out OSD display, exports the information representing and will carry out the cut zone of OSD display.Here, the cut zone carrying out OSD display means the cut zone of carrying out OSD at it in part or all.Figure 13 illustrates that the cut zone will carrying out OSD display is 3 cut zone J(7 of lower right side, 7), J(8,7), J(9,7) situation.

In the 19b of amount of change adjustment part, accept the brightness amount of change data De exported from amount of change data generating section 14, carry out the adjustment of brightness amount of change, to make can not produce luminosity difference between the cut zone will carrying out OSD display shown in the information exported from OSD handling part 23.By this action, in OSD display section, can suppress, make can not visuognosis to the cut zone luminance difference caused due to input image data.In this situation, preferably the brightness amount of change of the cut zone of carrying out OSD display is adjusted, to make the cut zone that reduces as far as possible to carry out OSD display and adjacent with this cut zone and do not carry out the luminance difference of the cut zone of OSD display.

As shown in figure 13, at bottom-right 3 cut zone J(7,7), J(8,7), J(9,7) when carrying out OSD display, the brightness amount of change will carrying out the cut zone of OSD display is adjusted, to make in these cut zone, luminosity difference between adjacent segmentation region is zero, and, the cut zone of OSD display and each cut zone J(7 adjacent with the cut zone will carrying out OSD display be carried out, 6), J(8,6), J(9,6), J(6,7) the summation of absolute value of luminance difference minimum.

The feature of each embodiment illustrated in above embodiment 1 ~ 6 mutually can be combined into exercise and use.Such as, the adjustment will carrying out the brightness amount of change of the cut zone of OSD display illustrated in embodiment 6 also can be applied to embodiment 1 ~ 5.

Above emission control device has been described in detail, but the light-emitting control method performed by this emission control device is also a part of the present invention.And then, process in above-mentioned emission control device, in other words part or all computing machine that namely can be programmed by software of the process performed with above-mentioned light-emitting control method is performed, and the recording medium of the program performing above-mentioned process for making computing machine and the embodied on computer readable that records this program is also a part of the present invention.

Label declaration

1: input terminal; 2: acceptance division; 3: modulating sections; 4: full frame characteristic quantity test section; 5-1 ~ 5-N: illuminating part; 6: cut zone characteristic quantity test section; 7: light emitting control data generating section; 8: extended region characteristic quantity test section; 9: luminous drive division; 10: full frame light emitting control data conversion unit; 11: cut zone variation calculating part; 12,12-1 ~ 12-M: extended region variation calculating part; 13: addition portion; 14: amount of change data generating section; 15: addition portion; 16: cut zone Difference Calculation portion; 17: select addition portion; 18,18b: characteristics of image detection unit; 19,19b: amount of change adjustment part; 20: compare handling part; 21,21b: ultimate value maintaining part; 22: ultimate value selection portion; 23:OSD handling part; 30: light emitting control.

Claims

1. an emission control device, it is characterized in that, described emission control device controls illuminating part, each cut zone that described illuminating part obtains the display frame of modulating sections is divided into multiple part is irradiated, be configured to control the luminosity of each cut zone described, described modulating sections is carried out optical modulation according to view data to illumination light and shows image

Described emission control device has:

Cut zone characteristic quantity test section, it, using each cut zone described as concern cut zone, detects the characteristic quantity of described concern cut zone as cut zone characteristic quantity;

Full frame characteristic quantity test section, it detects by the characteristic quantity of the image entirety of described pictorial data representation as full frame characteristic quantity;

Light emitting control, it, according to the described cut zone characteristic quantity relevant with described concern cut zone and described full frame characteristic quantity, controls the luminosity of the described illuminating part corresponding with described concern cut zone; And

Extended region characteristic quantity test section, it detects the characteristic quantity of the extended region of the cut zone comprised around described concern cut zone and described concern cut zone, as the extended region characteristic quantity relevant with described concern cut zone,

Described light emitting control, according to the described cut zone characteristic quantity relevant with described concern cut zone, described full frame characteristic quantity and described extended region characteristic quantity, controls the luminosity of the described illuminating part corresponding with described concern cut zone.

2. emission control device according to claim 1, is characterized in that,

The described extended region characteristic quantity relevant with described concern cut zone be when not being weighted the cut zone characteristic quantity relevant with described concern cut zone and the cut zone characteristic quantity relevant with the cut zone around described concern cut zone in the same manner as obtain.

3. emission control device according to claim 1, is characterized in that,

Described light emitting control has:

Light emitting control data generating section, it is according to the described cut zone characteristic quantity relevant with described concern cut zone and described extended region characteristic quantity and described full frame characteristic quantity, generates the light emitting control data being used for controlling the luminosity of the described illuminating part corresponding with described concern cut zone; And

Luminous drive division, it, with the luminosity corresponding for the described light emitting control data of described illuminating part generated with described light emitting control data generating section, makes described light from light source.

4. emission control device according to claim 3, is characterized in that,

Described light emitting control data generating section generates full frame light emitting control data by conversion according to described full frame characteristic quantity, and then for each of described multiple cut zone, get the described cut zone characteristic quantity relevant with described concern cut zone and the difference of described full frame characteristic quantity, generate the cut zone variation data relevant with described concern cut zone, get the described extended region characteristic quantity relevant with the extended region comprising described concern cut zone and the difference of described full frame characteristic quantity, generate the extended region variation data relevant with described concern cut zone, according to described full frame light emitting control data, the described cut zone variation data relevant with described concern cut zone and described extended region variation data, generate the described light emitting control data relevant with described concern cut zone.

5. emission control device according to claim 4, is characterized in that,

Described full frame characteristic quantity comprises the full frame characteristic quantity of the 1st kind and the full frame characteristic quantity of 2nd kind different from the characteristic quantity of the 1st kind,

The full frame characteristic quantity of described 2nd kind, described cut zone characteristic quantity and described extended region characteristic quantity are the characteristic quantities of identical type.

6. a light-emitting device, this light-emitting device has:

Emission control device described in any one in Claims 1 to 5; And

Multiple illuminating part, its luminosity is controlled by described emission control device.

7. an image display device, this image display device has:

Light-emitting device according to claim 6; And

Modulating sections, it carries out optical modulation according to described view data to the illumination light sent from described illuminating part and shows image.

8. a light-emitting control method, it is characterized in that, in described light-emitting control method, illuminating part is controlled, each cut zone that described illuminating part obtains the display frame of modulating sections is divided into multiple part is irradiated, be configured to control the luminosity of each cut zone described, described modulating sections is carried out optical modulation according to view data to illumination light and shows image

Described light-emitting control method has following steps:

Cut zone characteristic quantity detecting step, using each cut zone described as concern cut zone, detects the characteristic quantity of described concern cut zone as cut zone characteristic quantity;

Full frame characteristic quantity detecting step, detects by the characteristic quantity of the image entirety of described pictorial data representation as full frame characteristic quantity;

Light emitting control step, according to the described cut zone characteristic quantity relevant with described concern cut zone and described full frame characteristic quantity, controls the luminosity of the described illuminating part corresponding with described concern cut zone; And

Extended region characteristic quantity detecting step, detects the characteristic quantity of the extended region of the cut zone comprised around described concern cut zone and described concern cut zone, as the extended region characteristic quantity relevant with described concern cut zone,

In described light emitting control step, according to the described cut zone characteristic quantity relevant with described concern cut zone, described full frame characteristic quantity and described extended region characteristic quantity, the luminosity of the described illuminating part corresponding with described concern cut zone is controlled.